Transporting apparatus and printer using the same

Abstract

There is provided a transporting apparatus which includes a pair of transporting rollers including drive and driven rollers; a transporting path including a curved portion which changes a transporting direction of the transporting medium; a movable member which is changeable to a first attitude forming an outer side of the curved portion to guide the transporting medium, and a second attitude opening the curved portion not to form the outer side of the curved portion. The movable member has a guiding portion which guides the transporting medium between the pair of transporting rollers, in the first attitude, and a positioning portion which positions the guiding portion with respect to a shaft of the drive roller in the first attitude, and which is separated from the shaft of the drive roller in the second attitude.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]The present application claims priority from Japanese Patent Application No. 2010-125226, filed on May 31, 2010, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a transporting apparatus in which a guiding portion which guides a medium to be transported (hereinafter, ‘transporting medium’) between a pair of transporting rollers which transports by pinching the sheet shaped transporting medium is provided to a movable member, and a printer using the transporting apparatus.[0004]2. Description of the Related Art[0005]A transporting apparatus which includes a pair of transporting rollers which transports by pinching a sheet shaped transporting medium such as a recording paper, a card, and a sealed cover, and a transporting path through which the transporting medium passes, has hitherto been provided. The transporting app...

AI Technical Summary

Benefits of technology

This patent text is about a transporting apparatus used to transport a medium (such as paper) through a curved portion using transporting rollers. However, there is a problem of poor accuracy in positioning the medium relative to the rollers, which can cause the medium to hit the rollers and become dented. In another issue, the medium can become bent in the curved portion and pressed strongly against the guiding portion, hindering its transport and leaving scratches on its surface. The present invention aims to improve the accuracy of these positions, prevent the medium from hitting the rollers, and allow for smooth transport regardless of the size or type of medium.

Problems solved by technology

However, in the guiding portion provided to the movable member, an accuracy of position with respect to the nipping position is poor (not favorable), and there is a possibility that the transporting medium hits the pair of transporting roller and is dented.

However, when the guiding portion is brought excessively closer to the nipping position, while the transporting medium passes through the pair of transporting rollers, the transporting medium bent in the curved portion is pressed strongly against the guiding portion, and the frictional force between the transporting medium and the guiding portion becomes substantial, thereby hindering the transporting of the transporting medium and leaving a scratch on a surface of the transporting medium by the guiding portion.

As it has been described above, when the pair of transporting rollers is provided at an upstream side of the curved portion in the transporting apparatus having the guiding portion provided to the movable member, which forms an outer side of the curved portion, due to poor accuracy of relative positions of the guiding portion and the nipping position of the pair of transporting rollers, hindering of transportation of the transporting medium is anticipated.

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